Barcelona playmaker Andres Iniesta says his side need to treat Tuesday's Champions League last-16 second-leg tie at home to AC Milan like a final.
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The Spanish side have to retrieve a 2-0 first-leg deficit and Iniesta said: "It will be difficult but not impossible.
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"We have to play as if it was a final. That's what our mentality needs to be from the first minute to the last."
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Can Barcelona produce a comeback against AC
Milan?
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Barcelona have not lost a European tie at the Nou Camp since 20 October 2009
The Spanish club beat AC Milan in last season's quarter-finals and in the 2005-06 semi-finals
No team have turned around a two-goal deficit in the Champions League without the benefit of an away goal
AC Milan have suffered a setback with striker
Giampaolo Pazzini, who has nine goals in the last 11 games, sidelined.
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Pazzini, 28, scored the opener in last Friday's 2-0 victory at Genoa before having to go off injured with what a scan later revealed to be a micro-fracture in his right fibula.
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"It's a shame, a real shame that he's been ruled out," AC Milan vice-president Adriano Galliani told his club's official website.
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"Will we go there to play for him? Yes, for him too. We have lost an important striker but whoever replaces him will do well."
They can achieve it if they believe in themeselves. They have the capable players